Nyquist can read and write files, so perhaps you could achieve what you want by reading/writing a configuration file for your plug-in?
Yes I’d like to know how to read/create configuration presets. I can see settings stored in .audacity-data/pluginsettings.cfg but I’m not sure how to pre-seed it?
End goal is to have a PEMF frequency generator with a pick-list (e.g. below). Pick a set of frequencies then give end users the ability to adjust the frequencies - hence my inquiry for presets. I’d like to generate the Frequencies in Audacity because it is cross platform and allows me to playback a frequency and record the end result from the magnet in the same interface.
I’m still not clear about what you are trying to do, but Nyquist plug-ins are just text files, which Audacity then interprets to create the plug-in.
If you want specific choices, you just need to add a “choice” widget to the plug-in code with the choices that you want.
Here’s an example that can be run in the Nyquist Prompt effect (it could equally be written as a “plug-in” which you could then install, but to keep the example simple I’ll just give an example that can run in the Nyquist prompt).